I'm not sure, but my guess is people are taking a gamble. WWEI seems to release new contract info in the mornings, so someone could by at the end of the day in hopes of news in the morning. It's unlikely to drop too much if no news, so they could always sell again in the AM.
True and apparently "Management" left for China to formalize the recent joint ventures, last Friday. The share price rises on anticipation. If these joint ventures are part of integrating in China in order to get the two farms off the ground, then the PPA should follow. There will probably be, however, one or two more news releases regarding incidental stuff as nothing happens quickly in bureaucracy.